Improvement in pruning-shears



UNITED STATES PATENT OEEICE FRIEDRICH BINDER, OF BALTIMORE, MARYLAND.

IMPROVEMENT IN PRUNlNG-SHEARS.

Specification forming part of Letters Patent No. 59,168, dated October30, 1866.

To all whom it may concern.-

Be it known that I, FRIEDRICH BINDER, of Baltimore, in the county ofBaltimore and State of Maryland, have invented a new and usefulImprovement in Pruning-Shears; and I do hereby declare the following tobe a full, clear, and exact description of the same, sufcient to enableone skilled in the art to which the invention appertai-ns to make use ofit, reference being had to the accompanying drawing, which forms a partof this speciication, and in which my invention is represented by aperspective view.

ln these shears the cutting -jaw has a convex edge, and the holding-jawa serrated concave face with a central slot, into which the cutting edgeprojects. The convex edged blade works into the concave jaw in such amanner as to bring the force upon the jaws near the pivot, not pushingthe object outward toward the point. By the construction of the doubleholdingjaw the object is held on each side of the plane of separation,preventing' twist-ing and straining of the blades.

In the usual shears, where two cutting-faces l pass each other, there isa constant tendency where much power is exerted to twist upon the limbwhich is being cut, bending the blades outward from each other in adirection wherein they are the least able to withstand a strain; but inmy pruning-shears, the subject of this specification, the limb is heldsquarely by one jaw while the other divides it.

In the drawings A B' are the two jaws, which are prolonged into tangsfor insertion into the handles G l). E is the pivot upon which the jawsvibrate, and is made' removable by loosening the nut. The cuttingjaw Ahas a convex blade, and it works in a slot, b, in the holding-jaw B.

In cutting a heavy limb it is especially necessary to grasp it near thepivot, so as to exert the greatest possible leverage upon it. Thecuttingblade then enters the salient curved edge, pressing through thewood, and eventually protruding into the space b between the two facesof the holding-jaw.

Having described my invention, what I' claim therein as new, and desireto secure by Letters Patent, is-

The convex-edged knife working in a slot in the concave holding-j aw,and operating substantially as described.

FRIED. BINDER.

Witnesses ANDREW MERKER, MICHAEL PREISZ.

